From pnilsson@panix.com Sat Mar 25 23:11:12 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!pnilsson From: pnilsson@panix.com (Pavel Nilsson) Newsgroups: comp.dsp Subject: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar25.231112.3911@panix.com> Date: Sat, 25 Mar 1995 23:11:12 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Pavel Nilsson | pnilsson@panix.com PGP Key fingerprint: EC56 E1A5 EB4A 96A5 "Keep the channels open." From eokonkwo@pipeline.com Sun Mar 26 06:26:12 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!eokonkwo From: eokonkwo@pipeline.com (Elaine Okonkwo) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar26.062612.8586@pipeline.com> Date: Sun, 26 Mar 1995 06:26:12 GMT References: <1995Mar25.231112.3911@panix.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar25.231112.3911@panix.com>, pnilsson@panix.com (Pavel Nilsson) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Elaine Okonkwo Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------ From jivanov@stanford.edu Mon Mar 27 01:52:12 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!stanford!jivanov From: jivanov@stanford.edu (Jens Ivanov) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar27.015212.6973@stanford.edu> Date: Mon, 27 Mar 1995 01:52:12 GMT References: <1995Mar25.231112.3911@panix.com> <1995Mar26.062612.8586@pipeline.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Mar26.062612.8586@pipeline.com>, eokonkwo@pipeline.com (Elaine Okonkwo) writes: > That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Jens Ivanov *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0